Avoid Electromagnetic Interference (EMI): Install the tray away from high-voltage power cables, transformers, motors, and other sources of electromagnetic interference. Straight Routes: Minimize unnecessary bends and elevation changes. Can Low Voltage Dry Type Transformers be mounted close to communication equipment and cables, or is there a danger of electrical interference? Possible electrical interference produced by Low Voltage Transformers LV Transformers Applies to Low Voltage Transformers by SquareD/Schneider Electric. The use and installation of cable trays are covered by OSHA in 29 CFR 1910. 305(a)(3) and within various provisions of the National Electric Code (NEC). When properly planned, installed, and serviced, cable trays provide safe routing of power, low voltage control, data, and telecommunications. Question 1: Can mechanical utility piping or tubing containing water or compressed air be installed in cable trays with electrical cables? Answer: No. Cable trays are a support system for electrical cables, power, signal, and communication and optical fiber cables. NEC section 300-8 does not permit. Keep the shipping pallet attached to the transformer to assist with moving the unit to its final installation location. Verify that the nameplate matches the description from the building layout drawings (kVA, primary and secondary voltages, etc. Turn off the power supplying this equipment before servicing. While the bulk of the requirements do apply to what we commonly refer to as “high voltage”, NFPA 70 is also applicable to the wiring of low-voltage systems.